Quote:
Originally Posted by lincpimp
What do you think of the flexi ducting? I have recently (well in the last 3 years or so) installed a few systems and used the flexi duct in all of them. Seemed pretty good, and was super easy to do. I could easily do a single story house in a day if I was swapping out the old ducting for this... As long as someone could figure out the correct sizes for the various rooms...
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Flex is not good for full runs. There is a lot of static loss with flex, a lot of friction on the air passing through because the sides aren't smooth. Generally the most flex I'm allowed to put at the end of a run is 6', sometimes the specs for a job call for no more than 3'.